Cylinder construction for reciprocating engines



p 1933- M, o. CROSS 1,928,411

CYLINDER CONSTRUCTION FOR RECIPROCATING ENGINES Filed Oct. 14, 1931 a E /z A? W F F 4 I INVENTOR. 1 I

By M; ram 10- Clea s5 ATTORNEY.

Patented Sept. 26, 1933 ovmnnisa CONSTRUCTION FOR nncirnoca'rmc ENGINES Milton 0.,Cross, Detroit, Mich. FAppIication October 14, 19 1. Serial No. 568,791

7 Claims.

This invention relates to cylinder constructions for reciprocating engines and theobject of the invention :is to provide a metal cylinder sleeve which may be mounted in anengine block of lighter metal and which is provided with integral seats for the inlet; and exhaust valves.

Another object'of the invention is to provide a cylinder. construction Icy-which ahard wearing surface is provided for-the engine piston and a hard metal surface is also provided for the valve seats which are formed 'integrally with the cylinder and allowing the remainder of the engine to be built of aluminum or other light metal to provide an exceptionally light weight engine.

aetubular cylinder member having a relatively flange at the upper end which is apertured and faced to provide seats for the enginevalves, the said flange being secured in position between :29 the engine block and cylinder head.

Another object of the invention is to provide a cylinder having a flange at the upper end, in which the cylinder and flange are cast in one piece and the flange is provided with ports faced 7 oif to provide seats for the valves of the engine.

These objects and the several novel features of the invention are hereinafter more fully described and claimed and the preferred form of construction by which these objects are attained 3Q is shown in the accompanying drawing in which- Fig. 1 is a section through an engine embodying my invention and showing the valves arranged side by side at one side of the cylinder.

Fig. 2 is a section through another type of engine in which the Valves are arranged one behind the other at one side ofthe cylinder.

The cylinder 1, shown in Fig. 1, is tubular in form and is provided with a relatively thick flange 2 about the upper end. The cylinder 1 and flange 2 are cast integrally and the cylinder is machined on the inside to receive the piston 3 and is machined on the outside to fit within the cylindrical aperture provided therefor in the engine block 1. The flange 2 is provided with a Y pair of ports 5 arranged side by side at one side of the cylinder and only one of these ports is shown in Fig. 1. at 6 to provide a seat for the valve 7 which is of the usual type. The flange 2 fits on the top of the engine block 4 and the cylinder head 8 is positioned on top of the flange 2 and is secured to the engine block by means of the usual cylinder head bolts 9. a The compression chamber 10 in the cylinder head extends over the flange 5? 2 and cylinder 1 and'over the valve 7, as shown A further object of the invention is to provide The flange 2 is faced oii bronze or other suitable metal which will stand comparatively hard wear, while the cylinder head 8 and engine block 4 may be formed of aluminum or other light metal to provide a light weight motor.

An alternative form of the construction is shown in Fig. 2 in which the cylinder 1 and flange 2 are formed integrally but the ports 12 through the flange 2 are arranged radially in relation to the cylinder; that is, one valveis positioned behind the other. This flange 2 is faced off at 6 to provide seats for the valves 13 and the combus tion chamber 14 extends over these valves and is provided with an aperture 15 for the spark-plug. In either form, gaskets 16 are provided between i the flange 2 and the engine block and gaskets 1'7 are provided between the flange 2 and the cylinder head 8 or 18 as the case may be. This arrangement provides hard metal surfaces for the valve seats and cylinder walls and at the same time allows the use of lighter and softer metals for the crank case, engine block and cylinder head. i

From the foregoing description it becomes evident that the device is very simple and eflicient in operation, will not easily get out of order, provides hard metal surfaces at the points of greatest wear and provides a device which accomplishes, the objects described.

Having thus fully described my invention, its utility and mode of operation, what I claim and desire to secure by Letters Patent of the United States is- 1. In a cylinder construction for reciprocating engines, an engine block having a series of cylindrical apertures, a cylindrical sleeve fitting in 9 each cylindrical aperture and having an integral flange about the upper end thereof, the flange resting on the upper end of the cylinder block and being provided with valve ports therethrough, each valve port being faced off to provide a valve seat, a valve seating on each valve seat and a. cylinder head positioned on the said flange and secured to the engine block to bindingly secure the said flange between the cylinder head and engine block.

2. In a cylinder construction for reciprocating engines, an engine block having a series of cylindrical apertures, a cylindrical sleeve fitting in flange being provided with inlet and exhaust to ide alve eats ports and being faced off about'the said ports, and a cylinder head positioned on said flange and secured to the engine block.

4. In a cylinder construction for reciprocating engines, an engine block having a seriesof cylin-. dricai apertures, a cylindrical sleeve fitting in 'each cylindrical aperture and having an integral a ge at he u r n thereof, the flange being provided with valve ports therethrough and being faced off to provide valve seats about theports, a-cylinder head and meansfor bindingly securing the'said flange between the cylinder head and engine block.

5. In a cylinder construction for reciprocating engines, an engine blocl; having a cylindrical 0 aperture, a cylindrical sleeve fitting in the said aperture and having an integral flange at the upper end, the flange being provided with inlet and exhaust ports and being faced off to provide valve seats about the said ports, a cylinder head provided with a combustion chamber over the cylindrical sleeve and ports and means for bindingly securing the flange between the cylinder head and engine block.

6. In a cylinder construction for reciprocating engines, an engine block having a cylindrical aperture, a cylinder lining adapted to be inserted into and fitting within the cylindrical aperture and having an integral flange at the upper end thereof overlying the cylinder end and through which the cylinder opens, a series of ports in the said flange and the flange being provided with faces at the said ports forming valve seats, a cylinder head mounted on the flange and secured to the block to prevent displacement of the lining.

'7. In cylinder construction for reciprocating engines, an engine block formed of a material unadapated to provide bearing surfaces for pistons or valves 'of an engine, and providing a cylinder and valve openings, a cylindrical lining formed of a high grade metal providing good wearing surface for the piston and valvesand insertible in the block, the said flange overlying the cylinder end and'having ports therein formed with valve seats and registering with the openings in the engine block, valves reciprocatably mounted in the engine block and having a valve member for seating on the valve seats of the said ports of the flange, a piston reciprocatable in the lining, and a cylinder head secured to the end of the engine block engaged-by the flange and securing the 'flangein place, said head providing a compression chamber in communication with the valve ports.

MILTON 0. CROSS. 

